I've got replication running on Percona Server 5.5 by following this guide and wondered if I should add read-only=1 to my slave's my.cnf to make it read only?
The guide sets up replication for the mysql table so users are replicated but I am primarily using the slave to take mysqldumps, an in an emergency reconfiguring it to be master, so I don't believe we need (or should have) write enabled on it constantly?